本文以双沟轴承外圈为研究对象，从理论、数值模拟和实验角度对双沟轴承套圈冷辗扩成型基本规律进行了深入研究。
So this paper is related to the study of basic forming principles of cold rolling for double groove ball bearing outer rings from theory, numerical simulation and experiment.
从改进注射成型技术和模具制造技术的角度介绍了提高塑料光学零件的质量所采取的措施。
In the light of improving injection molding technique and mold making technique, the measures for improving the quality of plastic optical elements are given.
从传统的思维模式无法解释分流模结构的角度出发，去探询型材的挤压成型和模具设计。
Extrusion forming and die designing of profiles are discussed in view of the structure of distribution die which can not be explained by traditional thinking mode.
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